ICD-10-CM Code I00

Valid for Submission

I00 is a billable code used to specify a medical diagnosis of rheumatic fever without heart involvement. The code is valid for the fiscal year 2021 for the submission of HIPAA-covered transactions. The ICD-10-CM code I00 might also be used to specify conditions or terms like active rheumatic fever, annular erythema, chronic rheumatic fever, erythema marginatum, erythema marginatum in acute rheumatic fever, migratory polyarthritis, etc

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code I00:

Includes

Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.

• arthritis, rheumatic, acute or subacute

Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

• rheumatic fever with heart involvement I01.0 I01.9

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code I00 are found in the index:

• - Erythema, erythematous (infectional) (inflammation) - L53.9
  • - marginatum - L53.2
    • - in (due to) acute rheumatic fever - I00

• - Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) - R50.9
  • - rheumatic (active) (acute) (chronic) (subacute) - I00

• - Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved) - J18.9
  • - in (due to)
    • - rheumatic fever - I00
  • - rheumatic - I00

• - Rheumatic (acute) (subacute)
  • - pneumonia - I00

Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

• Active rheumatic fever
• Annular erythema
• Chronic rheumatic fever
• Erythema marginatum
• Erythema marginatum in acute rheumatic fever
• Migratory polyarthritis
• Recurrent rheumatic fever
• Rheumatic arteritis
• Rheumatic fever
• Rheumatic fever without heart involvement
• Rheumatic joint disease
• Rheumatic pneumonia
• Rheumatoid vasculitis
• Subacute arthritis
• Subacute arthropathy
• Subacute rheumatic arthritis

Diagnostic Related Groups

The ICD-10 code I00 is grouped in the following groups for version MS-DRG V38.0 What are Diagnostic Related Groups?
The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC). applicable from 10/01/2020 through 09/30/2021.

• 545 - CONNECTIVE TISSUE DISORDERS WITH MCC
• 546 - CONNECTIVE TISSUE DISORDERS WITH CC
• 547 - CONNECTIVE TISSUE DISORDERS WITHOUT CC/MCC

Convert I00 to ICD-9

• 390 - Rheum fev w/o hrt involv

Code Classification

• Diseases of the circulatory system (I00–I99)
  • Acute rheumatic fever (I00-I02)
    • Rheumatic fever without heart involvement (I00)

Code History

• FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
  (First year ICD-10-CM implemented into the HIPAA code set)
• FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
• FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
• FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
• FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
• FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021

Tools

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• Convert I00 to ICD-9